python編碼規范(二)——空行,換行,縮進
1.空行
- 空一行:用於類成員函數之間,或者用於區分不同邏輯塊
- 空兩行:類與類,類與函數,函數與函數之間
class Test(object): """Test class,提供通用的方法"""
def __init__(self): """Test的構造器:"""
pass
def function1(self): pass
def function2(self): pass
def function3(): pass
2.換行
非集合元素
- 反斜杠
with open('test.txt','w') as file_1, \ open("test2.txt", 'w') as file_2: file_2.write(file_1.read())
- 字符串
query_str = ('my name'
'is'
' %s') % "Tom"
print query_str
- 二元運算符
income = (gross_wages + taxable_interest + (dividends - qualified_dividends) - ira_deduction - student_loan_interest)
3.縮進
集合元素
- 沒有子模塊: 一層縮進
my_list = [ 1, 2, 3, 4, 5, 6, ]
result = some_function_that_takes_arguments( 'a', 'b', 'c', 'd', 'e', 'f', )
- 有子模塊: 兩層縮進
#if and
if (this_is_one_thing and that_is_another_thing): do_something() # function
def long_function_name( var_one, var_two, var_three,var_four): print(var_one)